if u want to get coins u can either rush to enemy nexus and destroy it and get kills (hero kit ) and if there is a boost by some one in the server u can get tons on coins to keep in mind the longer the games are the more coin u can get also if u an get ur hands on minigame ranks buy it ranks have coins all time as long as u have the rank
Iron Rank=1.5x
Gold Rank=2.0x
Diamond Rank=3.0x and
Crystal has weekly and monthly personal boosts